Autotek autocad raster design 2010 用户手册

Object Shortcut Menu

Right-click image ➤ REM  ➤ Create ➤ From Existing Vector

Command Line

iregfromvec

You can remove part of a selected region object using a variety of methods
that specify subregions, individual entities, or a series of connected entities.

For example, you may have selected a shaft as a circular region object and
would like to remove a drill hole from that shaft before moving the shaft. You
can do this by defining a REM circular region to remove the drill hole from
the region object.

The removal process is the same for all REM region objects, including enhanced
bitonal regions.

NOTE You cannot remove an enhanced bitonal region object or a primitive object
from a REM object in a grayscale or color image.

Removing has two main purposes:

■

If a region is associated, it deselects raster data in the REM object so that
when the object is dissociated, the deselected data remains in the original
image.

■

If a region is dissociated, it removes raster data so that when the object is
merged into an image or converted to a raster image, the removed data
will not be present.

You can use the following methods to specify what to remove from the REM
region:

■

Select an individual raster entity for removal, using menu selections Line,
Circle, Arc, or Smart Pick. Smart Pick is recommended if the entity is not
specifically a line, circle, or arc.

■

Define a subregion using one of the menu selections Rectangle, Polygon,
Diagonal, or Circle. This method works with pixels rather than raster
entities, and removes all pixels within the area you define.

Removing Part of a Region Object | 175